VA 11 53 13-2011 LABORATORY FUME HOODS.pdf

1、01-11 11 53 13 - 1 SECTION 11 53 13 LABORATORY FUME HOODS SPEC WRITER NOTES: 1. Delete between / _ / if not applicable to project. 2. Delete other items or paragraphs in the section that are not applicable and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION This section includes chemical (

2、general purpose) hoods, radioisotope hoods, and Perchloric acid hoods in designs and configurations specified hereunder. 1.2 DEFINITIONS A. CHEMICAL OR GENERAL-PURPOSE HOODS 1. AUXILIARY-AIR HOOD: A hood with a dedicated duct that supplies up to 50% outside air to the face of the hood. 2. BYPASS HOO

3、D: A hood that contains openings above the sash and below the airfoil, which redistribute the air to reduce fluctuations in face velocity and turbulence within the hood, when the sash is re-positioned. 3. 100% RE-CIRCULATORY (DUCTLESS) FUME HOODS: A ductless, self-contained, carbon and/or HEPA-filte

4、red enclosure, that draws air into the front of the hood, passes it through multi-stage filters, and then re-circulates it into the lab. These hoods can be placed onto fixed work surfaces or on mobile stands. 4. LOW-VELOCITY HOOD: A high-performance hood that yields energy savings by reducing the sa

5、sh opening and the corresponding exhaust volume, while maintaining safe containment levels with the sash raised for set-up and face velocity as low as 60fpm. B. Radioisotope Hood: A hood that is used for radioactive applications, with a stainless steel liner and an integral work surface. C. PERCHLOR

6、IC ACID HOOD: A hood that is dedicated for use with Perchloric Acid only, due to the potential reaction of the acid with other chemicals. The hood, duct and fan must have a water wash-down system for removal of perchlorate crystals (salts) after use. 1.3 RELATED WORK A. Section 22 15 00, GENERAL SER

7、VICE COMPRESSED-AIR SYSTEMS: Connections to Compressed Air System. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-01-11 11 53 13 - 2 B. Section 22 11 00, FACILITY WATER DISTRIBUTION: Plumbing Connections. C. Section 22 13 00, FACILITY SANITARY SEWER

8、AGE: Plumbing Connections. D. Section 22 66 00, CHEMICAL-WASTE SYSTEMS FOR LABORATORY and HEALTHCARE FACILITIES: Plumbing Connections. E. Section 22 62 00, VACUUM SYSTEMS FOR LABORATORY and HEALTHCARE FACILITIES: Connections to Gas and Vacuum Systems. F. Section 22 63 00, GAS SYSTEMS FOR LABORATORY

9、and HEALTHCARE FACILITIES: Connections to Gas and Vacuum Systems. G. Section 23 05 11, COMMON WORK RESULTS FOR HVAC. H. Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC and STEAM GENERATION: Integral Blowers on Hoods. I. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC: Face Velocity Se

10、nsor Controller. J. Section 23 34 00, HVAC FANS. K. Section 23 36 00, AIR TERMINAL UNITS: Airflow Control Valves. L. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS: Electrical Connections. M. Section 26 27 26, WIRING DEVICES: Electrical Devices. N. Section 26 29 11, LOW-VOLTAGE MOTOR ST

11、ARTERS: Motor Starters. 1.4 PERFORMANCE REQUIREMENTS A. Average Face Velocity for general chemical and ductless laboratory fume hoods: 0.51 m/s (100 fpm) with sash located at the average sash stop of 18 inches. B. Average Face Velocity for Low Velocity laboratory fume hoods can be as low as 60 fpm w

12、ith sash located at the average Low Velocity hood sash stop height of 12 to 18 inches. C. Containment: Furnish and install laboratory fume hoods that are tested according to ASHRAE 110 at a release rate of 4.0 L/min. (0.1 CFM) (VA Comment: Provide equivalent inch/pound unit.) 1. Face Velocity Variat

13、ion: Allowable VA variation threshold is not more than +-10% of average face velocity. SPEC WRITER NOTE: Size hood exhaust system for sash in the fully open position for the specified static pressure losses. 2. Sash Position: a. For horizontal-sash units, test with maximum opening on one side, with

14、maximum opening in the center, and with opening at each side equal to half of maximum opening. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-01-11 11 53 13 - 3 b. For combination-sash units, test with sash fully raised, with maximum opening on one

15、side, with maximum opening in the center, and with opening at each side equal to half of maximum opening. c. For Vertical Sash units, test with sash fully open, and at typical sash stop height of 18”. SPEC WRITER NOTE: Options for AM and AI rating requirements included below are examples only; verif

16、y requirements for project. d. VA Comment: Why vertical sash hoods not mentioned? 3. As-Manufactured (AM) Rating: AM / 0.05 (0.05 ppm) / _ /. 4. As-Installed (AI) Rating: AI / 0.05 (0.05 ppm) / _ /. D. Average Static-Pressure Loss: Not more than 93 Pa (3/8-inch wg) at 0.51-m/s (100-fpm) face velocit

17、y when tested according to SEFA 1.2. 1.5 QUALITY CONTROL A. Mechanical, electrical and associated systems shall be safe, reliable, efficient, durable, easily and safely operable, maintainable, and accessible. B. Standard Products: Material and equipment shall be the standard products of the selected

18、 manufacturer, and they should be regularly engaged in the manufacture of such products for at least 3 years. C. All items furnished shall be free from defects that would adversely affect the performance, maintainability and appearance of individual components and overall assembly. D. Standard Produ

19、cts: Material and equipment shall be the standard products of a manufacturer regularly engaged in the manufacture of the products for at least 3 years. The design, model and size of each item shall have been in satisfactory and efficient operation on at least three installations for approximately th

20、ree years. However, digital electronics devices, software and systems such as controls, instruments, computer work station, shall be the current generation of technology and basic design that has a proven satisfactory service record of at least three years. See other specification sections for any e

21、xceptions. E. Electrical Components and Devices: UL listed and labeled for intended use. 1.6 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-01-11 11

22、53 13 - 4 B. Manufacturers Literature and Data: Include the following: 1. Illustrations and descriptions of laboratory fume hoods and factory-installed devices for fume hoods. 2. Catalog or model numbers for each item incorporated into the work. 3. Static-pressure losses and exhaust volumes for fume

23、 hoods. 4. Results of testing according to ASHRAE 110. C. Shop Drawings: Show details of fabrication, installation, adjoining construction, coordination with mechanical and electrical work, anchorage, and other work required for complete installation. D. Field Test Reports: Indicate dates and times

24、of tests and certify test results. E. Factory Test Reports: Provide manufacturers QC checklist or other reports that indicate comprehensive factory testing has been performed, and the results of these tests have been certified. F. Operating Instructions: Comply with requirements in Section 01 00 00,

25、 GENERAL REQUIREMENTS. SPEC WRITER NOTE: Edit the following requirements to coordinate with project sustainability goals. G. LEED Information: 1. LEED (v 3.0) MR Credit 4, Recycled Content: Product data indicating percentages, by weight of post-consumer and post-industrial recycled content for produ

26、cts having recycled content: a. Include statement indicating costs for each product having recycled content. 2. LEED (V 3.0) MR Credit 5, Regional Materials: Manufacturers data identifying point of origin for products procured within 500 mile radius of the project: a. Include statement indicating co

27、sts for each product submitted. 1.7 APPLICABLE PUBLICATIONS A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. B. American National Standards Institute / American Society of Heating,

28、Refrigerating and Air-Conditioning Engineers (ANSI/ASHRAE): 110-1995Method of Testing Performance of Laboratory Fume Hoods C. Scientific Equipment and Furniture Association (SEFA): 1-2005Recommended Practices for Laboratory Fume Hoods Provided by IHSNot for ResaleNo reproduction or networking permit

29、ted without license from IHS-,-,-01-11 11 53 13 - 5 2-1999Recommended Practices for Installation D. National Fire Protection Association (NFPA): 45-2011.Standard on Fire Protection for Laboratories using Chemicals PART 2 PRODUCTS 2.1 FUME HOODS, GENERAL A. Furnish and install laboratory fume hoods t

30、hat comply with recommendations in SEFA 1 SPEC WRITER NOTE: Show types, quantities, and locations of service fixtures required for each type of fume hood on drawings. B. Confirm factory-installed service fixtures and electrical devices in locations shown on drawings. C. Ductwork: All ductwork shall

31、be stainless steel. Refer to Section 23 31 00 HVAC DUCTS and CASINGS. D. Face Velocity Controller (VAV Fume hoods): Provide fume hood exhaust controllers to control a damper in the hood discharge to maintain the velocity through the open face of the hood regardless of sash position. Refer to Section

32、 23 09 23 DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC. E. Gas, Air, and Vacuum Service Fixtures: Remote controlled; with valve identified by index button; with serrated tip outlets; color-code valves and outlets. Refer to Section 22 62 00 VACUUM SYSTEMS FOR LABORATORY and HEALTHCARE FACILITIES and Sectio

33、n 22 63 00 GAS SYSTEMS FOR LABORATORY and HEALTHCARE FACILITIES. F. Water Service Fixtures: Remote controlled, with integral vacuum breaker and as follows: 1. / Turret / 152.4 mm (6 inch) swivel gooseneck / Turret and 152.4 mm (6 inch) swivel gooseneck / outlet. 2. / PVC / Epoxy-coated brass /. 3. R

34、efer to Section 22 11 00 FACILITY WATER DISTRIBUTION. G. Service-Fixture Color-Coding: Color-code service fixtures as follows: Service ColorWater Dark Green Air OrangeGas Dark Blue Vacuum YellowH. Lighting Fixtures: Provided by IHSNot for ResaleNo reproduction or networking permitted without license

35、 from IHS-,-,-01-11 11 53 13 - 6 1. Vapor proof Fixtures: 120-V / incandescent / 2-tube fluorescent/. SPEC WRITER NOTE: Include the paragraph below where explosion-proof hoods are required and specifically identify explosion-proof type hoods on the drawings. These types of hoods are not typically us

36、ed and their application requires close coordination with the associated electrical requirements and exhaust fan. 2. Explosion-Proof Fixtures: 120-V / incandescent / 2-tube fluorescent /. Fixtures shall be shipped loose for field wiring and installation. SPEC WRITER NOTE: Edit the paragraph below fo

37、r project specific needs. I. Receptacles and Switches: Include junction box and cover plate. Refer to Section 26 27 26 WIRING DEVICES. 1. Duplex Receptacles: 120 V, single phase, / 15 A / 20 A /, 2 pole, 3 wire. 2. Single Receptacles: 250 V, single phase, / 15 A / 20 A /, 2 pole, 3 wire. SPEC WRITER

38、 NOTE: Provide if a sink is within 6 feet of the receptacle per NEC. 3. Ground Fault Interrupter (GFI) Duplex Receptacles: Integral unit with 2-pole, 3-wire, 120-V, 20-A receptacle. 4. Lighting Fixture Switches: Toggle, single pole, 120-277 V, 20 A. 5. Switches with Receptacles: Single-pole switch t

39、o control lighting fixtures and 120-V, 15-A, 2-pole, 3-wire single receptacle. 6. Switches with Neon Pilots: Single-pole toggle turns on pilot light, which indicates switch and load are “on“; 120 V, 15 A. 7. Motor Starter Switches: Double-pole switch with pilot light and thermal-overload protection.

40、 Refer to Section 26 29 11 LOW-VOLTAGE MOTOR STARTERS. SPEC WRITER NOTE: Where explosion-proof hoods are required, the hood be provided with only an explosion-proof light and no wiring. The wiring of the hood light and any electrical devices (switches, receptacles, etc.) needs to be shown on the ele

41、ctrical drawings per NEC requirements. J. Airflow Monitor: With audible alarm and warning light. Provide digital type unit with alarm contacts to allow connection to the DDC control Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-01-11 11 53 13 - 7 s

42、ystem to facilitate remote monitoring. Refer to Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC K. Airflow Control Valve (VAV Hoods): Refer to Section 23 36 00 AIR TERMINAL UNITS. SPEC WRITER NOTES: 1. For fume hood exteriors, SEFA 1 requires materials resistant to chemical fumes and exposu

43、res encountered in the laboratory; therefore, it allows the use of epoxy-coated metal. 2. If a specific exterior material is required, insert requirements in articles below describing fume hoods. 3. Match liner and work surface to type of hood, chemicals, and the work that will be performed in the h

44、ood. 2.2 BYPASS FUME HOODS A. Airflow Systems: Bypass. For hoods served by variable air volume exhaust systems, a factory installed bypass block shall be installed to restrict the bypass and allow reduction of the exhaust air volume as the sash is lowered while maintaining a constant face velocity.

45、B. Liners: / Polyester resin / Stainless Steel / Type 304, N0. 4 finish C. Work Surfaces: Epoxy resin. D. Sinks: Epoxy resin. 1. Cup Sinks: Equip with DN 40 (NPS 1-1/2) tailpiece, sink stopper, and P trap. 2. Laboratory Sinks: Equip with DN 40 (NPS 1-1/2) sink outlet, sink stopper, beehive overflow,

46、 and P trap. E. Lighting Fixtures: / Vapor proof / Explosion-proof where specifically indicated on the drawings /. F. Blowers: Remote; sized to create exhaust air volume that produces average face velocity indicated with sashes fully open. Blowers shall be constructed with chemical chemical-resistan

47、t coating. Refer to Section 23 34 00 HVAC FANS. G. Sashes: / Vertical / Horizontal / Combination / type; fully tempered safety glass. 1. Accessories: Sash stops, commonly installed 18”. H. Bases: / Table / Cabinet /. 2.3 RADIOISOTOPE FUME HOODS A. Airflow Systems: Bypass Provided by IHSNot for Resal

48、eNo reproduction or networking permitted without license from IHS-,-,-01-11 11 53 13 - 8 B. Liners and Work Surfaces: Stainless steel, Type 304, No. 4 finish; seamless construction; and with integral dished work surface. C. Lighting Fixtures: Vapor proof. SPEC WRITER NOTES: The designer shall coordi

49、nate the need to install filters in the exhaust air stream with the end-users and VA Radiology Safety Officer. Based on the number and type of isotopes, the exhaust air stream may require (a) HEPA (99.97% efficiency at 0.3 Microns), (b) HEPA and Active Charcoal Filters, or No Filters in the exhaust air prior to its discharge outdoor